Method of manufacturing hair-pins or the like.



No. 781,024. V PATENTBD JAN.. 31, 1905.

METHOD 0I' MANUFACTURING HAIR PINS OR THE LIKE.

' APPLICATION FILED Nov. 19. 1904.

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PATENT OEEICE.

METHOD- OF MANUFACTURING HAIR-PINS OR THE LIKE.

SPECFICATION forming part of Letters Patent No. 781,024, dated January 31, 195.

Application filed November 19, 1904. Serial No. 233,527.

My invention has reference to improve# ments .inthemanufacture of hair-pins and the like which are composed of a material becoming plastic under the vapplication of heat and which are reinforced by a metallic core adapted to give strength to athe pin or like article.

To this end my invention consists, essentially, in cutting suitable lengths from a wire the plastic material back a short distan ce at the tion on the line 8 3, Fig. l.

-covered with the moldable materiahsuch as celluloid, then heating the ends of these lengths to soften thematerial, then pushing ends and clipping the projecting wires, again heating the ends to allow the plastic material to assume its original shape, dipping into cement to fill or seal the ends, and finally pointing saidends. j

The nature of my invention will best be understood when described in connection with the accompanying drawings, in which-- Figure l is a top view of a die, showing some of the lengths in place. Fig. 2 is a section on the line 2 2, Fig. l. Fig. 8 is a sec- Figs. 4 to 7 are sections of the lengths at various stages of manufacture.v Fig. 8 is aplan and part section of the device used to upset the material at the ends of the lengths.

Similar letters of reference designate corresponding parts throughout the several views. For the sake of clearness the'lengths are shown considerably out of proportion.

Referring now to-Figs. 4 to 8, W designates a resilient wire of the proper strength and about which has been forced a material O, such as celluloid, becoming plastic under the application of heat. I make the hair-pins or like articles from this wire by cutting it into suitable lengths, as shown `in Fig. 4. The

Yends of these lengths are then heated, prefer- `being pointed.

ably by dipping them into water at or near the boiling-point to soften the material. The 'wire is then placed in supports g, Fig. 8, and the ends pressed against the tubular device D until a suiiicient amount of the wire W pro- I jects, thereby upsetting the plastic material l, so that it assumes a shape about such as e, Figs. 5 and 8. rl`he projecting ends f of the wire W are then clipped off and the ends of the lengths again heated by dipping into hot water, when the celluloid reassumes the tubular form, as shown in Fig. 6, or -may be made so assume such form by passing the ends of the lengths through the lingers. The ends are then sealed by dipping into celluloid cement and are now ready to be pointed. For this purpose a number of these lengths are placed in grooves a, Figs. l to 3, of the the grooves ct of the die A, is placed upon the die A and the whole heated and subjected to pressure in a hydraulic press or other suitable means, then allowed to cool in the die or removed to a hand-press, and cooled. After cooling the lengths are removed and then have the form as shown in Fig. 7, both ends The slight barb caused by the'compression is removed by grinding or otherwise, and the finished pieces are then bent to the desired form.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. The method of forming hair-pins or the like from wire covered with celluloid, which method consists in cutting the wire into proper lengths, upsetting the celluloid at the ends, clipping off the projecting ends of the wire and pointing the ends from the upset celluloid.

2. The herein-described method for the manufacture of hair-pins andthe like consisting in heating the ends of suitable lengths lof wire covered with a material, celluloid,

which becomes plastic under the application of heat, forcing back a portion of said plastic material, then clipping the projecting ends of the Wire and again heating the ends of the lengths, sealing said en ds with a cement, and iinally pointing the ends.

3. The herein-described method for the manufacture of hair-pins and the like consisting in heating the ends of suitable lengths of wire covered with a material,l Celluloid, which becomes plastic under the application of heat, forcing back a portion ot' said plastic material, then clipping the projecting ends of the Wire and again heating the ends of the lengths, sealing them with a cement, and iinally compressing these lengths in a die so as to' point the ends thereof.

ln testimony whereof .l have signed my I5 name to this speeilicntion, in the presence of two subscribingwitnesses, this 17th day of November, 190i.

THEOPHILUS ROOS. lVitnesses:

A. FABER DU FAUR, AGNES GRAY. 

